Evaluate the following :cosec230°.tan245° – sec260°

Q4 of 268 Page 4

Evaluate the following :
cosec²30°.tan²45° – sec²60°

We know that

cosec (30^o) = 2

Tan(45^o) = 1

sec (60 ^o) = 2

Now putting the values;

= (2)² × (1)² - (2)²

= 4 – 4

= 0

Find the numerical value of the following :

Evaluate the following :

sin30°.cos45° + cos30°.sin45°

Evaluate the following :

2sin²30°.tan60° – 3cos²60°.sec²30°

Evaluate the following :

tan60° . cosec²45° + sec²60°.tan45°