10th Class
Mathematics
Introduction to Trigonometry
Question Bank
Introduction to Trigonometry
question_answer
If \[\mathbf{co}{{\mathbf{t}}^{\mathbf{4}}}\theta \text{ }\mathbf{-}\text{ }\mathbf{co}{{\mathbf{t}}^{\mathbf{2}}}\theta \mathbf{=1}\], then the value of \[\mathbf{co}{{\mathbf{s}}^{\mathbf{4}}}\theta \text{ }+\text{ }\mathbf{co}{{\mathbf{s}}^{\mathbf{2}}}\theta \] is _________