Question

The value of sec^2 70degree-tan^2 70° is equals to :-
(a)0 (b) 1
(c) 2
(d)none of these​

Answer 1

we have know that,

(sec²x - tan²x = 1)

Given,

sec²70° - tan²70°

= 1 -----------------------------(b) .

Hope it's helpful to you.

Answer 2

The value of sec² 70° - tan² 70° = 1

Given :

The expression sec² 70° - tan² 70°

To find :

The value of sec² 70° - tan² 70° ie equal to

(a) 0

(b) 1

(c) 2

(d)none of these

Formula :

sec² θ - tan² θ = 1

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is

sec² 70° - tan² 70°

Step 2 of 2 :

Find the value of the expression

We use the formula

sec² θ - tan² θ = 1

Taking θ = 70° we get

sec² 70° - tan² 70° = 1

So the value of sec² 70° - tan² 70° = 1

Hence the correct option is (b) 1

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