If 3x + 4y – 11 = 18 and 8x – 6y + 12 = 6, then what is the value of 5x – 3y

What is the value of [sin (90– 10θ) – cos (p – 6θ)]/ [cos (p/2 – 10θ) – sin (p – 6θ)]?

A

tan 2\u03b8

B

cot 2\u03b8

C

cot \u03b8

D

cot 3\u03b8

What is the value of {sin (90 – x) cos [π – (x – y)]} + {cos (90 – x) sin [π – (y – x)]}?

A

-cos y

B

-sin y

C

cos x

D

tan y

What is the value of sin (B – C) cos (A – D) + sin (A – B) cos (C – D) + sin (C – A) cos (B – D)?

A

3\/2

B

\u2013 3

C

1

D

0

What is the value of [1 – tan (90 – θ) + sec (90 – θ)]/[tan (90 – θ) + sec (90 – θ) + 1]?

A

cot (\u03b8\/2)

B

tan (\u03b8\/2)

C

sin \u03b8

D

cos \u03b8

What is the value of {[sin (x + y) – 2 sin x + sin (x – y)]/[cos (x – y) + cos (x + y) – 2 cos x]} × [(sin 10x – sin 8x)/(cos 10x + cos 8x)]?

A

0

B

tan2x

C

1

D

2 tan x

If a + b + c = 7/12, 3a – 4b + 5c = 3/4 and 7a – 11b – 13c = – 7/12, then what is the value of a + c?

A

1\/2

B

5\/12

C

3\/4

D

1\/4

পিতা ও পুত্রের বয়সের অনুপাত ১১ঃ ৪ । পুত্রের বয়স ১৬ বছর হলে পিতার বয়স কত?

A

৪৪ বছর

B

৪২ বছর

C

৫২ বছর

D

৫৪ বছর

What is the value of [sin (90 – A) + cos (180 – 2A)]/[cos (90 – 2A) + sin (180 – A)]?

A

sin (A\/2) cos A

B

cot (A\/2)

C

tan (A\/2)

D

sin A cos (A\/2)

What is the value of cos (90 – B) sin (C – A) + sin (90 + A) cos (B + C) – sin (90 – C) cos (A + B)?

A

1

B

sin ( A + B \u2013 C)

C

cos ( B + C \u2013 A)

D

0

What is the value of cos [(180 – θ)/2] cos [(180 – 9θ)/2] + sin [(180 – 3θ)/2] sin [(180 – 13θ)/2]?

A

sin 2\u03b8 sin 4\u03b8

B

cos 2\u03b8 cos 6\u03b8

C

sin 2\u03b8 sin 6\u03b8

D

cos 2\u03b8 cos 4\u03b8

If 3x + 4y – 11 = 18 and 8x – 6y + 12 = 6, then what is the value of 5x – 3y – 9?

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