1. If tan x =a/b prove that b cos x +a sin 2x =b. To prove ,CosecA+ 2cosec2A = sec A cot A/2 Cos a.cos2A.cos4A.cos8A

Question

Vikas TU · Answer

Dear Student,

tanx = a/b => sinx/cosx = a/b => bsinx = acosx.

2asinxcosx = 2bsin²x => asin2x = 2bsin²x => asin2x – bsin²x = bsin²x

=> asin2x + bcos²x – bsin²x = bcos²x + bsin²x => asin2x + bcos2x = b.

Cheers!!

Regards,

Vikas (B. Tech. 4^th year
Thapar University)

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1. If tan x =a/b prove that b cos x +a sin 2x =b. To prove ,CosecA+ 2cosec2A = sec A cot A/2 Cos a.cos2A.cos4A.cos8A

1. If tan x =a/b prove that b cos x +a sin 2x =b.

To prove ,CosecA+ 2cosec2A = sec A cot A/2

Cos a.cos2A.cos4A.cos8A

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1. If tan x =a/b prove that b cos x +a sin 2x =b. To prove ,CosecA+ 2cosec2A = sec A cot A/2 Cos a.cos2A.cos4A.cos8A

1. If tan x =a/b prove that b cos x +a sin 2x =b. To prove ,CosecA+ 2cosec2A = sec A cot A/2 Cos a.cos2A.cos4A.cos8A

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1. If tan x =a/b prove that b cos x +a sin 2x =b.

To prove ,CosecA+ 2cosec2A = sec A cot A/2

Cos a.cos2A.cos4A.cos8A