Question

tan theta = - 1/root 5 then diagnose cos theta
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Answer 1

Answer:

Here is the correct answer mate...

Thank you ☺✌...

Answer 2

Step-by-step explanation:

Since tan theta=p/b=1/√5

So p=1,and b=√5

we know that h²=p²+b²

h=√(1²+√5²)

h=√26

so cos theta=b/h

=√5/√6(as theta is in first quadrant cos theta is positive)

P.S.

use this rule to check the sign of trigonometric functions-

All sin tan cos(in 1st quad all +ve,in 2nd quad only sin and cosec +ve,in third quad only tan and cot +ve,and in 4th only cos and sec +ve)