Question

sin5a=cosa and 5a<90 then value of tan4a??? ​

Answer 1

Step by Step process :

Step 1 ::

we know that if

$\sin(x) = \cos(y)$

then x= 90°-y

(here x,y,90 are in degrees)

so by using this we will get:

5a = 90°-a

6a=90°

a=15°

Step 2 ::

put the value if a in than4a

tan4a=tan(4×15°)

tan4a=tan(60°)

$tan4a = \sqrt{3}$

I hope you understand the solution.

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